Thanks, Alby! The Gnatcatcher took a lot of patience, as did the Least Tern. The terns are fast, erratic fliers, too, and had the add difficulty of being just post-sunrise on a cloudy morning. I was pretty happy to get anything at all of them.

--------------Lou FCD is still in school, so we should only count him as a baby biologist. -carlsonjok -deprecatedI think I might love you. Don't tell Deadman -Wolfhound

In the realm of genetic anomalies found in living organisms perhaps none is more visually striking than bilateral gynandromorphism, a condition where an animal or insect contains both male and female characteristics, evenly split, right down the middle. While cases have been reported in lobsters, crabs and even in birds, it seems butterflies and moths lucked out with the visual splendor of having both male and female wings as a result of the anomaly. For those interested in the science, here’s a bit from Elise over at IFLScience:

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In insects the mechanism is fairly well understood. A fly with XX chromosomes will be a female. However, an embryo that loses a Y chromosome still develops into what looks like an adult male, although it will be sterile. It’s thought that bilateral gynandromorphism occurs when two sperm enter an egg. One of those sperm fuses with the nucleus of the egg and a female insect develops. The other sperm develops without another set of chromosomes within the same egg. Both a male and a female insect develop within the same body.

There is a link in the article to many more images than are shown on Colossal. Enjoy.

I've been practicing some more with my 100mm F2.8 Canon macro lens. These were taken without ring flash (didn't have it with me) and with handheld camera using manual focus at the most stopped down aperture I could manage given the light conditions. Hence the very shallow depth of field.

Pyrrhosoma nymphula - Large Red Damselfly, Male

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